Metal

Metal transmutes a unit's body into solid metal, granting significant damage reduction at the cost of movement. A Metal unit becomes extremely tanky, shrugging off hits that would normally be devastating, but their Speed drops to near-zero, effectively rooting them in place for the duration.

Metal works well as a defensive cooldown on frontline cats who are already in position and need to survive a burst of incoming damage. The tradeoff is that you cannot reposition, so activating Metal at the wrong time can leave a cat stranded in a dangerous spot once the effect wears off. Electric-element attacks are particularly effective against Metal units. Pair Metal with Thorns to turn the immobility into an advantage: enemies attacking into a Metal cat with Thorns take reflected damage while barely scratching through the armor.